化工进展
化工進展
화공진전
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2012年
4期
948-951
,共4页
选择性催化还原%催化剂制造%TiO2%脱硝
選擇性催化還原%催化劑製造%TiO2%脫硝
선택성최화환원%최화제제조%TiO2%탈초
selective catalytic reduction(SCR)%catalyst fabrication%TiO2%deNOx
针对广泛应用的蜂窝型SCR催化剂的制造过程,分析了主要原材料TiO2的基本性质,如颗粒大小、粒度分布、形状、团聚程度、化学组成和纯度等,以及这些基本性质对催化剂制造过程中混合、挤出、干燥和煅烧等工序的影响。研究结果表明,精细程度非常高的脱硝催化剂制造过程对TiO2的要求是:粒度分布范围较窄或单一,颗粒为球形或等轴形状,在混合工序所要求的pH值条件下团聚程度低以及TiO2的化学组成和纯度指标高。
針對廣汎應用的蜂窩型SCR催化劑的製造過程,分析瞭主要原材料TiO2的基本性質,如顆粒大小、粒度分佈、形狀、糰聚程度、化學組成和純度等,以及這些基本性質對催化劑製造過程中混閤、擠齣、榦燥和煅燒等工序的影響。研究結果錶明,精細程度非常高的脫硝催化劑製造過程對TiO2的要求是:粒度分佈範圍較窄或單一,顆粒為毬形或等軸形狀,在混閤工序所要求的pH值條件下糰聚程度低以及TiO2的化學組成和純度指標高。
침대엄범응용적봉와형SCR최화제적제조과정,분석료주요원재료TiO2적기본성질,여과립대소、립도분포、형상、단취정도、화학조성화순도등,이급저사기본성질대최화제제조과정중혼합、제출、간조화단소등공서적영향。연구결과표명,정세정도비상고적탈초최화제제조과정대TiO2적요구시:립도분포범위교착혹단일,과립위구형혹등축형상,재혼합공서소요구적pH치조건하단취정도저이급TiO2적화학조성화순도지표고。
Aiming at the fabrication process of widely used honeycomb SCR catalyst,the properties of TiO2 has been analyzed,including particle size,size distribution,shape,degree of agglomeration,chemical composition and purity,and their influence on manufacture procedure of mixing,extrusion,drying and calcinations.The fine fabrication of SCR catalyst is facilitated by the narrow or monodisperse size distribution of TiO2,spherical or equiaxial shape TiO2 particles,low agglomeration degree of TiO2 particles at the required pH in mixing procedure.High standard is also required on the chemical composition and purity of TiO2.